Psalm 125:3For the scepter of the wicked will not rest upon the land allotted to the righteous, so that the righteous will not put forth their hands to injustice.

Treasury of Scripture

He has put forth his hands against such as be at peace with him: he has broken his covenant.

but

1 Samuel 22:17 And the king said unto the footmen that stood about him, Turn, and slay the priests of the LORD; because their hand also is with David, and because they knew when he fled, and did not shew it to me. But the servants of the king would not put forth their hand to fall upon the priests of the LORD.

1 Samuel 24:10 Behold, this day thine eyes have seen how that the LORD had delivered thee to day into mine hand in the cave: and some bade me kill thee: but mine eye spared thee; and I said, I will not put forth mine hand against my lord; for he is the LORD'S anointed.

2 Samuel 18:12 And the man said unto Joab, Though I should receive a thousand shekels of silver in mine hand, yet would I not put forth mine hand against the king's son: for in our hearing the king charged thee and Abishai and Ittai, saying, Beware that none touch the young man Absalom.

at peace

Psalm 7:4 If I have rewarded evil unto him that was at peace with me; (yea, I have delivered him that without cause is mine enemy:)

Psalm 109:5 And they have rewarded me evil for good, and hatred for my love.

Verse 20. - He hath put forth his hands againstsuch as be at peace with him. Some explain "he" as "the wicked collectively," and maintain that in this verse and the next no particular person is pointed at; but it seems better to regard the psalmist as "suddenly reverting to the fixed and deepest thought in his heart - the treachery of his friend" (Canon Cook). Ahithophel had put forth his hand against such as were at peace with him." He hath broken his covenant. The covenant of friendship with David (ver. 14), not, perhaps, a formal one, but involved in the terms on which they stood one towards the other.

55:16-23 In every trial let us call upon the Lord, and he will save us. He shall hear us, and not blame us for coming too often; the oftener the more welcome. David had thought all were against him; but now he sees there were many with him, more than he supposed; and the glory of this he gives to God, for it is he that raises us up friends, and makes them faithful to us. There are more true Christians, and believers have more real friends, than in their gloomy hours they suppose. His enemies should be reckoned with, and brought down; they could not ease themselves of their fears, as David could, by faith in God. Mortal men, though ever so high and strong, will easily be crushed by an eternal God. Those who are not reclaimed by the rod of affliction, will certainly be brought down to the pit of destruction. The burden of afflictions is very heavy, especially when attended with the temptations of Satan; there is also the burden of sin and corruption. The only relief under it is, to look to Christ, who bore it. Whatever it is that thou desirest God should give thee, leave it to him to give it in his own way and time. Care is a burden, it makes the heart stoop. We must commit our ways and works to the Lord; let him do as seemeth him good, and let us be satisfied. To cast our burden upon God, is to rest upon his providence and promise. And if we do so, he will carry us in the arms of his power, as a nurse carries a child; and will strengthen our spirits by his Spirit, so that they shall sustain the trial. He will never suffer the righteous to be moved; to be so shaken by any troubles, as to quit their duty to God, or their comfort in him. He will not suffer them to be utterly cast down. He, who bore the burden of our sorrows, desires us to leave to him to bear the burden of our cares, that, as he knows what is best for us, he may provide it accordingly. Why do not we trust Christ to govern the world which he redeemed?